AwkChannelWiki: Editing string manipulation function

The [[awk]] programming language provides a set of [[builtin]] functions for performing various string manipulation operations: * [[gsub]] * [[index]] * [[length]] * [[match]] * [[split]] * [[sprintf]] * [[sub]] * [[substr]] * [[case conversion|tolower]] * [[case conversion|toupper]]

Summary:

This change is a minor edit.

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Link to [[wiki page]]

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== [[Nowiki]]:
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